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I had wanted to give you a post on a new location OM2012 widget but I had some issues with the prototype and couldn’t figure it out yet. So that one is coming soon. But I still wanted to do my weekly post. So here we are.

Problem

A question I hear a lot, why is SCOM not detecting/reporting a SNMP trap. I’m sure it is send out but I do not see it in SCOM.

Analyze

Okay we could face several problems here. For example the SNMP trap isn’t send at all or it is not send/received at the SCOM agent OR it is received but the MP has a bug so the workflow isn’t processing the trap event. First I would look if the trap is received at all, because most of the time this is the problem.

Solution

There are several tools to use for this. But I like using build-in tools. So it will be WMI to use. WMI has a SNMP provider that will do the job for us. Below I will describe in simple steps how to check if a SNMP trap is coming in at all.

1. Stop the SCOM agent.

Yes it sounds strange but since the agent uses also the SNMP trap port it will block the WMI trap receiver. By stopping the SCOM agent you set the port free.